Year: 2025
Type: article
Abstract: Land permafrost thaw transfers increasing amounts of organic matter and nutrients to the Arctic Ocean. These nutrients could stimulate primary production directly, or indirectly following remineralization in sediments. Projections of this effect are limited by scarce observations and poor understanding of the underlying controls. Here, we focus on the Kara, Laptev, and East Siberian Sea shelves that receive strong input from large rivers and coastal erosion, linking ship‐board measurements of sediment–water nutrient fluxes to environmental parameters associated with land input. Ammonium and nitrite releases were positively related to high concentration and low decomposition state of terrigenous organic matter, based on biomarkers. Nitrate release was related to O2 penetration depth. Phosphate and silicate release were highest at stations with strong marine influence. Our findings suggest that changes in environmental conditions, such as land input, might alter the nutrient balance in the Siberian Arctic Ocean, with implications for ecological and biogeochemical processes.
DOI: 10.1002/lol2.70039
Institutions: Stockholm University, Bolin Centre for Climate Research, Lomonosov Moscow State University, Tomsk Polytechnic University, Norwegian Institute for Water Research, Ulyanovsk State University, University of Gothenburg, Russian Academy of Sciences, Sakhalin State University, National Research Tomsk State University, V.I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences, University of Delaware
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,700
Awards: G1505834979, G200408876, Grand Challenges in Climate Research: Thawing Permafrost in the Arctic AND Brown Cloud Emissions from India and China, Nitrous oxide fluxes from the East Siberian Arctic Shelf, G3578893620, G4742269901, G503943694, Ocean Acidification in the SIberian Seas (OASIS): The impact of permafrost thaw and methane release, G5980604122, The effect of psilocybin on depression symptom severity, peripheral biomarkers and synaptic density – a single dose randomized double blind, placebo-controlled phase 2 PET study, Emissions of the strong greenhouse gas nitrous oxide from thawing coastal and subsea permafrost in the Siberian Arctic, G712881263, G7129323109, G7355620938, G8157898897, G826183916, G830394982, G8933129223
OpenAlex ID: W4411134424